Dave Jones

excess solar through heat pump into slab. the eddi has a feature where it can decide if its more cost effective to drive the heat pump over an immersion for example.

free heating can be leveraged.

new regs now so will see many more as hard to get decent SAP with gas now.

method of heat source is irrelevant. What is the heat loss calcs for your desired internal temperature. Size a unit accordingly.

the correct way of doing this is to put a cavity tray at ground level which 'lifts' the DPC 225 or however many blocks higher. Builder cant have been upto much if they didnt know that.

have a look at other applications submitted and copy one of them.

100mm pipe centres and no zones!

hard to tell but it looks like some repointing has happened in cement mortar, this will trap water in and force it through the inside. very common with 9" solid walls which yours almost certainly is from that period. Check its all lime for starters. May have a slate dpc but unlikely, our 1899 has nothing including no footing. Brickwork should resist being soaked and dry out, if water cannot escape through the front due to modern cement it will go through to the inside.

start with the heatloss calcs.

wheres the cavity closer ?

how far away new meter, can you not just get longer tails and leave everything as is ?

100mm pipe centres for low flow temp and max efficiency. obviously zoning will drop efficiency a fair bit.

your SE will have contacts.

not really. in England, BCO take the planning ref and issue paperwork against it for new build.

anything in ground that has been inspected constitues a 'start' normal way to lock in planning commencement is a short run of footings/garage. locked in forever.